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#multiplatform
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# multiplatform
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Paul Woitaschek
05/17/2021, 1:03 PMHow do you handle inline classes? On 1.4.x we've exposed the kotlin duration to ios. But now with the changes of the internal representation from millis to long the exposed value isn't usable any longer.
I thought about `actual typealias`ing it for ios to a regular class and keep duration for android but that won't work either because you'd need to chose between an interface and a class.
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louiscad
05/17/2021, 1:32 PMHow is it no longer usable?
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Paul Woitaschek
05/17/2021, 1:45 PMWell in objective c, inline classes just get exported as the value they wrap
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louiscad
05/17/2021, 1:45 PMJust like in Java
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Paul Woitaschek
05/17/2021, 1:45 PMSo in 1.4.32 having a duration in public api means exposing nanoseconds:
https://github.com/JetBrains/kotlin/blob/9e50a239b4f34406a6c6f987b29d5ceedca777a8/libraries/stdlib/src/kotlin/time/Duration.kt#L12
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louiscad
05/17/2021, 1:46 PMIs it actually always in nanoseconds?
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Paul Woitaschek
05/17/2021, 1:46 PMYes it is
But now with 1.5 it was changed to long
And based on some bitmagic it either uses nanos or millis:
https://github.com/JetBrains/kotlin/blob/e73e039e43d740b890eaa4d7256362eeaf6ff1f7/libraries/stdlib/src/kotlin/time/Duration.kt#L38
So now having kotlin duration in your public api is unusable from obj-c
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louiscad
05/17/2021, 1:51 PMWell, you can add overloads for Obj-C, or if the type is not an interface, extensions will also work and be seen like members in Swift/Obj-C.
(If it's an interface, you might want to make it a stateless abstract class instead)
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